A gorgeous private island owned by Seattle-based telecommunications billionaire Craig McCaw (used to live in Atherton, CA ) is on the market for a jaw-dropping $75 million.With such luxurious amenities as a private harbor, spa, and Jack Nicklaus-designed golf course, it’s an amazing private retreat fit for a billionaire.

Though the island has a cool historical past of manufacturing dating back to the early 1900s, McCaw’s J.I. Properties first purchased the property for $19 million in 1994.